This Week's Guests:

• Dereck & Beverly Joubert
National Geographic Explorers-in-Residence, filmmakers and photographers Dereck and Beverly Joubert visit Boyd in the studio to discuss their work to save lions. The iconic beast’s numbers are dwindling and the species could become extinct by 2020 if nothing is done. That is why, in cooperation with National Geographic, the Jouberts have started the Big Cat Initiative.Read More

• Sherry Woodard
Sherry Woodard, a nationally certified dog trainer, has done what some might consider the impossible: she’s rehabilitated Michael Vick’s pitbulls. Woodward tells Boyd that the only danger now posed by these once fierce dogs is that they might lick you to death.Read More

• Michael Benson
In the new book Far Out: A Space-Time Chronicle, author and filmmaker Michael Benson has compiled a unique collection of astronomical images that explore the far reaches of the universe. Benson tells Boyd the images were collected from observatories around the world, satellites and even a 35-mm camera with wide lenses.Get the Book

• Jill Heinerth
Are you claustrophobic? Scared of tight spaces? What if that space was pitch black and filled with water? Well, those are the conditions that Jill Heinerth confronts every time she goes to work. Heinerth is a cave diver and she tells Boyd how she stays safe miles below the surface.Read More

• Steve Rinella
In 2005, author Steve Rinella won a permit allowing him to hunt a wild bison. Rinella headed into the Alaskan wilderness where he managed to kill an American buffalo and pack out the meat all while being trailed by grizzly bears and suffering from hypothermia. Rinella tells the tale in his new book American Buffalo: In Search of a Lost Icon.Get the Book

• Steve Schmidt
A team of scientists, including National Geographic grantee Steve Schmidt, have found the highest-altitude microbial life on Earth. Schmidt tells Boyd how he trekked to South America to vents near the rim of the Socompa volcano, which sits on the border between Argentina and Chile in the Atacama Desert.Read More